The Type Ia Supernova 2004S, a Clone of SN 2001el, and the Optimal Photometric Bands for Extinction Estimation

Krisciunas, K.; Garnavich, P.; Stanishev, V.; Suntzeff, Nicholas B.; Prieto, J. L.; Espinoza, J.; González, David; Salvo, M.; Rosa, N. E.; Smartt, S. J.; Maund, Justyn R.; Kudritzki, Rolf‐Peter

doi:10.1086/509126

Cited by 97 publications

(98 citation statements)

References 63 publications

(82 reference statements)

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“…The V minus NIR colours of SNe Ia are quite uniform around B maximum light. It has been demonstrated that they can be considered as a reddening estimator that is more reliable than colours obtained in the optical wavelengths (Krisciunas et al 2007). By adopting the (V − NIR) loci provided by Candia et al (2003, hereafter C03) for the slow declining SNe, we obtain E(V − J) = 0.40 ± 0.05, E(V − H) = 0.50 ± 0.07 mag.…”

Section: Direct Measurementsmentioning

confidence: 65%

The slowly declining type Ia supernova 2008fv and the near-infrared second maximum

Biscardi

Brocato

Arkharov

et al. 2012

A&A

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Aims. We present optical and near-infrared (NIR) photometry of supernova (SN) 2008fv and a brief investigation of SN type Ia to search for possible correlations between the properties of NIR light curves and the optical decline rate. Methods. We analyse our BVRI and JHK observations to derive light curves (LCs), colour curves, and the bolometric behaviour of SN 2008fv. Data range from about five days before to two months after maximum. We also collect a database of the main characteristics of NIR LCs of SNe Ia available in literature. Results. We find close similarities between the observed LCs of the SN event studied here and SN 2000E. SN 2008fv is a slow-declining SNe Ia with a post-maximum decline of Δm 15,B = 0.96 ± 0.08 mag and a B-band maximum luminosity of M B,0 = −19.40 ± 0.1 mag, close to the value of normal SNe Ia. The optical and NIR data allow us to constrain the host galaxy reddening of NGC 3147, E(B−V) = 0.22 ± 0.05 mag and its distance μ = 33.2 ± 0.1 mag. Furthermore, we derive a synthesized 56 Ni mass of about 0.7 M , by using the well-known relation between the maximum luminosity of the uvoir bolometric light curve and the initial content of 56 Ni. We investigate the correlation between the NIR characteristics of LCs and optical properties by collecting data of a sample of 40 SNe. We derive quantitative relationships involving the epoch of the secondary maximum in the JHK bands and the decline rate Δm 15 (B). Further, we find no correlations between Δm 15 measured in the JHK bands and the optical Δm 15 (B). In contrast, quite evident correlations with the Δm 15 (B) and Δm 40 (J)/Δm 15 (H).

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Section: Direct Measurementsmentioning

confidence: 65%

The slowly declining type Ia supernova 2008fv and the near-infrared second maximum

Biscardi

Brocato

Arkharov

et al. 2012

A&A

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“…Optical photometry of SN 2004S has been published by both Misra et al (2005) and Krisciunas et al (2007), with the latter authors adding a significant NIR light curve. They both found SN 2004S to be photometrically normal and we adopted a date for B-band maximum light of February 4.37 ± 0.25 (Krisciunas et al 2007). Krisciunas et al (2007) emphasize that SN 2004S andSN 2001el were found to be photometric twins.…”

Section: Observationsmentioning

confidence: 99%

DEVIATIONS FROM AXISYMMETRY REVEALED BY LINE POLARIZATION IN THE NORMAL TYPE Ia SUPERNOVA 2004S

Chornock¹,

Filippenko²

2008

The Astronomical Journal

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We present a single epoch of high signal-to-noise ratio spectropolarimetry of the Type Ia supernova (SN Ia) 2004S taken 9 days after maximum light. The flux spectrum is normal, but with the additional presence of high-velocity (HV) line features in both Ca ii and Fe ii. The object shows continuum polarization at the 0.4% level in the red, a value which appears to be typical of SNe Ia. The continuum data are consistent with a ∼10% global asphericity in an axisymmetric geometry. Unlike previous observations of other SNe Ia with HV features, the HV features in SN 2004S show no strong polarimetric signature, though this may be due to the timing of our observations. Instead, the object shows line-polarization features (P 0.5%) that are rotated with respect to the axis of symmetry of the continuum. The line features are visible in Si ii, Fe ii, and Ca ii, and appear to be narrowly confined in velocity space just above the photosphere. These polarization features are a result of compositional inhomogeneities in the ejecta. They may represent newly synthesized elements whose clumpy spatial distribution within the ejecta is distinct from that of the globally aspherical ejecta as a whole.

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“…Therefore, exactly how the group boundaries were drawn was not important. (Gerardy et al 2004), and SN 2004S (Krisciunas et al 2007); the broad-line SN 1983G (McCall et al 1984 and SN 2002er (Kotak et al 2006); and the shallow-silicon SN 1999aa , SN 1999ac (Garavini et al 2005), SN 2000E (Valentini et al 2003), SN 2005cg (Quimby et al 2006), and SN 2003fg (the proposed super-Chandrasekhar SN Ia, also known as SNLS-03D3bb; Howell et al 2006;Jeffery et al 2007a; but see also Hillebrandt et al 2007). SN 1999ac is a borderline case: in Figure 1, it falls between two core-normals, but on the basis of the shape, depth, and width of the 6100 Å absorption, we include it with the shallow-silicons.…”

Section: Introductionmentioning

confidence: 99%

Comparative Direct Analysis of Type Ia Supernova Spectra. III. Premaximum

Branch¹,

Troxel²,

Jeffery³

et al. 2007

PUBL ASTRON SOC PAC

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ABSTRACT.A comparative study of spectra of 21 Type Ia supernovae (SNe Ia) obtained about 1 week before maximum light, and 8 spectra obtained 11 or more days before maximum, is presented. To a large extent, the premaximum spectra exhibit the defining characteristics of the four groups defined in Paper II (core normal, broad line, cool, and shallow silicon). Comparisons with SYNOW synthetic spectra show that all strong features and most weak ones can be accounted for in a plausible way. The issues of detached high-velocity features, the possible ubiquity of carbon clumps, the maximum detectable ejecta velocities, and the possibility of blueshifted emission-line peaks are discussed.

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The Type Ia Supernova 2004S, a Clone of SN 2001el, and the Optimal Photometric Bands for Extinction Estimation

Cited by 97 publications

References 63 publications

The slowly declining type Ia supernova 2008fv and the near-infrared second maximum

The slowly declining type Ia supernova 2008fv and the near-infrared second maximum

DEVIATIONS FROM AXISYMMETRY REVEALED BY LINE POLARIZATION IN THE NORMAL TYPE Ia SUPERNOVA 2004S

Comparative Direct Analysis of Type Ia Supernova Spectra. III. Premaximum

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